Autograph, leaves the competition far behind. Not only can it do what Zap-a-graph and Graph EQ can do but much more. And it can work on older computers with less memory and is faster. It is very intuitive to use.
Auto graph is a dynamic software. It uses dependent, selectable mathematical objects, to help the student to understand the basic principles of probability, statistics and coordinate geometry in both 2D and 3D. It works well with data projectors and interactive white-boards.
There are two levels of operation, Standard and Advanced. The standard is greatly simplified with a reduced set of options for the user.
It is designed to help teachers and pupils visualize mathematics at secondary/college level, using dynamically linked 'objects'.